there was a fatal commuter train derailment in new york city this morning. authorities say at least four people were killed and dozens more injured when several cars of the train went off the tracks and came to rest right beside the hudson river. investigators from the national transportation safety board were dispatched to the scene to investigate the cause of the accident. the derailment occurred at a big curve in the track, requiring the train operator to go slowly. authorities say the train has data recorders that should reveal how fast it was traveling when the accident occurred at 7:20 on a sunday morning. the fire commissioner said on a workday, fully occupied, it would have been a tremendous disaster. >>> two top members of congress are warning that the terror threat against the united states has increased despite the killing of osama bin laden and american drone attacks that have killed other high-level al qaeda leaders. the head of the senate intelligence committee, california democrat diane feinstein and the chairman of the house intelligence comm